- voice out for presenter
- text chat in for other participants
- slide/presentation support
- screen sharing
- doesn't require a big client
- doesn't require a dial-in conference call
- low-ish bandwidth
I know about Second Life, but I believe it violates the "doesn't require a big client" and "low-ish bandwidth" requirements. I'm looking for something that is easy for attendees of the meeting to use, preferably without needing to install software on their machine.